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nouveau: Add busy() query, determines if BOs can be mapped immediately.

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This commit is contained in:
Younes Manton 2008-12-11 17:55:16 -05:00
parent 7289c388f4
commit af2a856caa
2 changed files with 37 additions and 0 deletions
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34
src/gallium/winsys/drm/nouveau/nouveau_bo.c
View file

@ -272,6 +272,40 @@ nouveau_bo_del(struct nouveau_bo **bo)
nouveau_bo_del_cb(nvbo);
}
int
nouveau_bo_busy(struct nouveau_bo *bo, uint32_t flags)
{
struct nouveau_bo_priv *nvbo = nouveau_bo(bo);
struct nouveau_fence *fence;
if (!nvbo)
return -EINVAL;
/* If the buffer is pending it must be busy, unless
* both are RD, in which case we can allow access */
if (nvbo->pending) {
if ((nvbo->pending->flags & NOUVEAU_BO_RDWR) == NOUVEAU_BO_RD &&
(flags & NOUVEAU_BO_RDWR) == NOUVEAU_BO_RD)
return 0;
else
return 1;
}
if (flags & NOUVEAU_BO_WR)
fence = nvbo->fence;
else
fence = nvbo->wr_fence;
/* If the buffer is not pending and doesn't have a fence
* that conflicts with our flags then it can't be busy
*/
if (!fence)
return 0;
else
/* If the fence is signalled the buffer is not busy, else is busy */
return !nouveau_fence(fence)->signalled;
}
int
nouveau_bo_map(struct nouveau_bo *bo, uint32_t flags)
{

3
src/gallium/winsys/drm/nouveau/nouveau_drmif.h
View file

@ -286,6 +286,9 @@ nouveau_bo_set_status(struct nouveau_bo *, uint32_t flags);
extern void
nouveau_bo_del(struct nouveau_bo **);
extern int
nouveau_bo_busy(struct nouveau_bo *bo, uint32_t flags);
extern int
nouveau_bo_map(struct nouveau_bo *, uint32_t flags);